The report, by the respected European Foundation, also argues that a higher level of carbon dioxide (CO2) – the main greenhouse gas – is not a problem because it helps to boost crop yields.

And it claims that the warming we are now experiencing is “mostly natural”, pointing to historic shifts in the climate such as when Vikings farmed on Greenland in medieval times.

Political analyst Jim McConalogue, who wrote the report, said: “This demonstrates how tenuous, improper and indeed false the scientific and political claims are for man-made global warming, from claims that climate change can be controlled by human activity to the proposition that CO2 emissions represent a severe threat to our way of life, when in fact there is little evidence to support any of these claims.”

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» How much "Man Made" CO2 Is In The Earth's Atmosphere?
I think ALL of the CO2 in the Earth's Atmosphere is from man.
I'm not sure how much "Man Made" CO2 is in the Earth's Atmosphere.
There is .04% CO2 in the Earth's Atmosphere and of that "Man" has added an extra 4% (1 part in 62,500)